<template>
  <view
      class="u-keyboard"
      @touchmove.stop.prevent="noop"
  >
    <view
        v-for="(group, i) in abc ? engKeyBoardList : areaList"
        :key="i"
        :class="[i + 1 === 4 && 'u-keyboard__button--center']"
        :index="i"
        class="u-keyboard__button"
    >
      <view
          v-if="i === 3"
          class="u-keyboard__button__inner-wrapper"
      >
        <view
            :hover-stay-time="200"
            class="u-keyboard__button__inner-wrapper__left"
            hover-class="u-hover-class"
            @tap="changeCarInputMode"
        >
          <text
              :class="[!abc && 'u-keyboard__button__inner-wrapper__left__lang--active']"
              class="u-keyboard__button__inner-wrapper__left__lang"
          >中
          </text>
          <text class="u-keyboard__button__inner-wrapper__left__line">/</text>
          <text
              :class="[abc && 'u-keyboard__button__inner-wrapper__left__lang--active']"
              class="u-keyboard__button__inner-wrapper__left__lang"
          >英
          </text>
        </view>
      </view>
      <view
          v-for="(item, j) in group"
          :key="j"
          class="u-keyboard__button__inner-wrapper"
      >
        <view
            :hover-stay-time="200"
            class="u-keyboard__button__inner-wrapper__inner"
            hover-class="u-hover-class"
            @tap="carInputClick(i, j)"
        >
          <text class="u-keyboard__button__inner-wrapper__inner__text">{{ item }}</text>
        </view>
      </view>
      <view
          v-if="i === 3"
          class="u-keyboard__button__inner-wrapper"
          @touchend="clearTimer"
          @touchstart="backspaceClick"
      >
        <view
            :hover-stay-time="200"
            class="u-keyboard__button__inner-wrapper__right"
            hover-class="u-hover-class"
        >
          <u-icon
              color="#303133"
              name="backspace"
              size="28"
          ></u-icon>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
import props from './props.js';

/**
 * keyboard 键盘组件
 * @description 此为uView自定义的键盘面板，内含了数字键盘，车牌号键，身份证号键盘3种模式，都有可以打乱按键顺序的选项。
 * @tutorial https://uviewui.com/components/keyboard.html
 * @property {Boolean} random 是否打乱键盘的顺序
 * @event {Function} change 点击键盘触发
 * @event {Function} backspace 点击退格键触发
 * @example <u-keyboard ref="uKeyboard" mode="car" v-model="show"></u-keyboard>
 */
export default {
  name: "u-keyboard",
  mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
  data() {
    return {
      // 车牌输入时，abc=true为输入车牌号码，bac=false为输入省份中文简称
      abc: false
    };
  },
  computed: {
    areaList() {
      let data = [
        '京',
        '沪',
        '粤',
        '津',
        '冀',
        '豫',
        '云',
        '辽',
        '黑',
        '湘',
        '皖',
        '鲁',
        '苏',
        '浙',
        '赣',
        '鄂',
        '桂',
        '甘',
        '晋',
        '陕',
        '蒙',
        '吉',
        '闽',
        '贵',
        '渝',
        '川',
        '青',
        '琼',
        '宁',
        '挂',
        '藏',
        '港',
        '澳',
        '新',
        '使',
        '学'
      ];
      let tmp = [];
      // 打乱顺序
      if (this.random) data = uni.$u.randomArray(data);
      // 切割成二维数组
      tmp[0] = data.slice(0, 10);
      tmp[1] = data.slice(10, 20);
      tmp[2] = data.slice(20, 30);
      tmp[3] = data.slice(30, 36);
      return tmp;
    },
    engKeyBoardList() {
      let data = [
        1,
        2,
        3,
        4,
        5,
        6,
        7,
        8,
        9,
        0,
        'Q',
        'W',
        'E',
        'R',
        'T',
        'Y',
        'U',
        'I',
        'O',
        'P',
        'A',
        'S',
        'D',
        'F',
        'G',
        'H',
        'J',
        'K',
        'L',
        'Z',
        'X',
        'C',
        'V',
        'B',
        'N',
        'M'
      ];
      let tmp = [];
      if (this.random) data = uni.$u.randomArray(data);
      tmp[0] = data.slice(0, 10);
      tmp[1] = data.slice(10, 20);
      tmp[2] = data.slice(20, 30);
      tmp[3] = data.slice(30, 36);
      return tmp;
    }
  },
  methods: {
    // 点击键盘按钮
    carInputClick(i, j) {
      let value = '';
      // 不同模式，获取不同数组的值
      if (this.abc) value = this.engKeyBoardList[i][j];
      else value = this.areaList[i][j];
      // 如果允许自动切换，则将中文状态切换为英文
      if (!this.abc && this.autoChange) uni.$u.sleep(200).then(() => this.abc = true)
      this.$emit('change', value);
    },
    // 修改汽车牌键盘的输入模式，中文|英文
    changeCarInputMode() {
      this.abc = !this.abc;
    },
    // 点击退格键
    backspaceClick() {
      this.$emit('backspace');
      clearInterval(this.timer); //再次清空定时器，防止重复注册定时器
      this.timer = null;
      this.timer = setInterval(() => {
        this.$emit('backspace');
      }, 250);
    },
    clearTimer() {
      clearInterval(this.timer);
      this.timer = null;
    },
  }
};
</script>

<style lang="scss" scoped>
@import "../../libs/css/components.scss";

$u-car-keyboard-background-color: rgb(224, 228, 230) !default;
$u-car-keyboard-padding:6px 0 6px !default;
$u-car-keyboard-button-inner-width:64rpx !default;
$u-car-keyboard-button-inner-background-color:#FFFFFF !default;
$u-car-keyboard-button-height:80rpx !default;
$u-car-keyboard-button-inner-box-shadow:0 1px 0px #999992 !default;
$u-car-keyboard-button-border-radius:4px !default;
$u-car-keyboard-button-inner-margin:8rpx 5rpx !default;
$u-car-keyboard-button-text-font-size:16px !default;
$u-car-keyboard-button-text-color:$u-main-color !default;
$u-car-keyboard-center-inner-margin: 0 4rpx !default;
$u-car-keyboard-special-button-width:134rpx !default;
$u-car-keyboard-lang-font-size:16px !default;
$u-car-keyboard-lang-color:$u-main-color !default;
$u-car-keyboard-active-color:$u-primary !default;
$u-car-keyboard-line-font-size:15px !default;
$u-car-keyboard-line-color:$u-main-color !default;
$u-car-keyboard-line-margin:0 1px !default;
$u-car-keyboard-u-hover-class-background-color:#BBBCC6 !default;

.u-keyboard {
  @include flex(column);
  justify-content: space-around;
  background-color: $u-car-keyboard-background-color;
  align-items: stretch;
  padding: $u-car-keyboard-padding;

  &__button {
    @include flex;
    justify-content: center;
    flex: 1;
    /* #ifndef APP-NVUE */
    /* #endif */

    &__inner-wrapper {
      box-shadow: $u-car-keyboard-button-inner-box-shadow;
      margin: $u-car-keyboard-button-inner-margin;
      border-radius: $u-car-keyboard-button-border-radius;

      &__inner {
        @include flex;
        justify-content: center;
        align-items: center;
        width: $u-car-keyboard-button-inner-width;
        background-color: $u-car-keyboard-button-inner-background-color;
        height: $u-car-keyboard-button-height;
        border-radius: $u-car-keyboard-button-border-radius;

        &__text {
          font-size: $u-car-keyboard-button-text-font-size;
          color: $u-car-keyboard-button-text-color;
        }
      }

      &__left,
      &__right {
        border-radius: $u-car-keyboard-button-border-radius;
        width: $u-car-keyboard-special-button-width;
        height: $u-car-keyboard-button-height;
        background-color: $u-car-keyboard-u-hover-class-background-color;
        @include flex;
        justify-content: center;
        align-items: center;
        box-shadow: $u-car-keyboard-button-inner-box-shadow;
      }

      &__left {
        &__line {
          font-size: $u-car-keyboard-line-font-size;
          color: $u-car-keyboard-line-color;
          margin: $u-car-keyboard-line-margin;
        }

        &__lang {
          font-size: $u-car-keyboard-lang-font-size;
          color: $u-car-keyboard-lang-color;

          &--active {
            color: $u-car-keyboard-active-color;
          }
        }
      }
    }
  }
}

.u-hover-class {
  background-color: $u-car-keyboard-u-hover-class-background-color;
}
</style>
